Sanden GAUS-315EQTD Installation Manual page 14

System operation using continuous power

The system runs its water heating cycle once a day to fill up the storage tank unit with
heated water.

If the blackout time function is selected (setting is covered on Page 19) the unit will not
operate during the blackout times – this function is typically used on installations that
have time of use electricity tariffs.

The water heating cycle operation starts automatically when the residual hot water in
the tank unit is less than 40 gallons (150 litres)

The system will not run if the electrical power supply is cut off (i.e. if it is connected to
off-peak power). However, the system will automatically start operation, once the
electric power is restored
System operation if connected to off-peak electricity

There are no special settings for the off-peak connection. The system will run once
power becomes available and the temperature in the tank drops below the set point of
the tank thermistor.

If connecting the unit to off peak power ensure that the off peak tariff provides a
minimum of 5 hours continuous power, as it can take at least four hours to fill the tank
unit with hot water.
If the ambient temperature is lower than 50

If the unit is connected to off peak power and hot water consumption has been higher
than normal, hot water might not be available until the next power supply cycle.

Daily frequency and amount of hot water consumption may also affect the duration of
the heating cycle operation.
Select the electrical supply mode that best suits the customer's hot water
consumption. The type of off-peak connection may need to be changed if hot water
supply is not maintained as required.
Sanden Heat Pump – Installation Manual
Page 14 of 33
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F (10 C) this can be longer.